Happy 2022 from the Froggies (showcasing our egg/chicken/dino dance moves) !


The whole team (now 70 froggies scattered accross 3 continents) wishes you a Merry Christmas and Happy New Year !

What happened in 2021 at TreeFrog ?

One batch, One week,
15 billion stem cells

We released new data demonstrating unprecedented highly reproducible hiPSC expansion in 10L bioreactors with C-Stem™, together with a benchmark of cell culture technologies for hiPSC mass-production.

Leap forward in cell therapy manufacturing: highly reproducible stem cell expansion in 10L bioreactors, with exponential growth and preserved quality

$75M Series B
& New CEO

The round was led by Bpifrance Large Venture, with the participation of Leonard Green & Partners, Bristol Myers & Squibb and Xange. Former Board Member Frédéric Desdouits, PhD, was appointed CEO.

Now 70 froggies, and still growing

We’ve grown from 30 to 70 in 2021, and we’ll hire in 2022 in Bordeaux (France), Boston (USA) and Kobe (Japan).

Doubling lab capacities in Bordeaux 

We opened a second building in Pessac (900m²), including a 200m² biophysics lab and increased our clean room capacity by 2-fold.

SPOILER ARLERT – What to expect in 2022 ?

New data in Parkinson’s disease

We’re on track to meet our target of a first-in-human trial in 2024. Exciting new in vivo results to come ! 

GMP compliant encapsulation

Our first clinical-grade device for high-throughput cell encapsulation will go live by the end of the year ! Automated, closed, 21 CFR part 11 compliant, it will allow to seed bioreactors up to 10L.


Boston, nous voilà !

Kévin Alessandri, PhD, co-founder, will move to Boston in 2022 to set up a tech hub, with the aim of driving the adoption of the C-Stem™ technology in the U.S.

Let’s meet in 2022, in the USA, Japan or EU

We will attend over 20 scientific and business events in 2022. Meet us there !

As we celebrate our third birthday and embark on a new journey – that will lead us to treat our first patients in 2024 – we’d like to address very special thanks to the French ecosystem, which made TreeFrog possible and still supports our ambition to make cell therapies for all.

Wishing you a very successful, healthy and happy 2022 !

Frederic, Kevin, Maxime & Jean-Luc

and the froggies